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82d734f7a3
parallel_for_each currently requires each thread to process at least 10 elements. However, when indexing, it's fine for a thread to handle just a single CU. This patch parameterizes this, and updates the one user.
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/* Self tests for parallel_for_each
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Copyright (C) 2021-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdbsupport/selftest.h"
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#include "gdbsupport/parallel-for.h"
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#if CXX_STD_THREAD
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#include "gdbsupport/thread-pool.h"
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namespace selftests {
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namespace parallel_for {
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struct save_restore_n_threads
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{
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save_restore_n_threads ()
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: n_threads (gdb::thread_pool::g_thread_pool->thread_count ())
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{
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}
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~save_restore_n_threads ()
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{
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gdb::thread_pool::g_thread_pool->set_thread_count (n_threads);
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}
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int n_threads;
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};
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static void
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test (int n_threads)
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{
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save_restore_n_threads saver;
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gdb::thread_pool::g_thread_pool->set_thread_count (n_threads);
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#define NUMBER 10000
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std::atomic<int> counter (0);
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gdb::parallel_for_each (1, 0, NUMBER,
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[&] (int start, int end)
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{
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counter += end - start;
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});
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SELF_CHECK (counter == NUMBER);
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#undef NUMBER
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}
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static void
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test_n_threads ()
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{
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test (0);
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test (1);
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test (3);
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}
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}
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}
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#endif /* CXX_STD_THREAD */
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void _initialize_parallel_for_selftests ();
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void
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_initialize_parallel_for_selftests ()
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{
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#ifdef CXX_STD_THREAD
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selftests::register_test ("parallel_for",
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selftests::parallel_for::test_n_threads);
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#endif /* CXX_STD_THREAD */
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}
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